Latching cover plate type nested assembly type beam-column connection joint

Abstract

The application discloses a mortise cover plate type nested assembly type beam column connecting joint, which comprises a column assembly, a beam assembly and a connecting piece. The column assembly comprises an upper steel column, a lower steel column and a box-shaped bracket with an embedded bolt pipeline; the beam assembly comprises a horizontal I-shaped steel beam and a box-shaped accessory with an embedded bolt pipeline; and the connecting piece comprises a mortise cover plate and high-strength bolts, all the accessories are welded in a factory. When being installed, the box-shaped accessory with the embedded bolt pipeline is placed into the box-shaped bracket with the embedded bolt pipeline along the horizontal direction, and the beam column assembly is connected by the mortise cover plate, so that the integrity of the joint area is better, and finally the fastening between the components is completed by the high-strength bolts. The assembly type beam column joint provided by the application is connected by full bolts at a construction site, is convenient to operate, shortens the construction time, is green and environment-friendly, and has good mechanical properties; the upper and lower flange surfaces of the I-shaped steel beam are kept flat, and the subsequent floor installation is facilitated; and the joint body is in a nested structure, so that the rigidity and the strength of the joint are effectively improved.

Description

Technical Field

[0001] This invention relates to a nested prefabricated beam-column connection node with a pin cover plate, belonging to the field of structural engineering technology. Background Technology

[0002] In recent years, with the country's vigorous promotion of industrialization, my country's prefabricated building industry has developed rapidly. Prefabricated steel structure buildings have the characteristics of rapid construction, low energy consumption, no restriction by climate and environment, and less construction site waste, which can realize green, energy-saving and environmentally friendly buildings; moreover, as an industrial product itself, it has rich facades and good performance, and has great development potential in the field of prefabricated buildings.

[0003] Traditional steel structure construction sites involve a large amount of welding work, which is not only time-consuming and prone to air pollution, but also cannot guarantee the reliability of welding processes in flush connections. Compared with traditional steel structures, prefabricated steel structures have advantages such as improved production efficiency, energy saving, development of green buildings, and improved and guaranteed construction quality. They have been vigorously promoted in my country. For example, the Z-type connection structure mentioned in the existing technology (Zhang Ailin, Su Lei, Cao Zhiliang, Pu Shuanghui, Lin Haipeng. Seismic performance test study and finite element analysis of double-sided Z-type all-bolted beam-column connection node [J]. Industrial Building, 2021, 51(02): 59-65+89.) can effectively improve the seismic performance of the node. The shortcoming is that it cannot guarantee that the upper and lower surfaces of the beam are flush and without any protrusions. Vigorously developing prefabricated buildings, focusing on promoting the construction of prefabricated steel structure residential buildings, continuously improving the standardization level of components, promoting the formation of a complete industrial chain, promoting the coordinated development of intelligent construction and building industrialization, and conforming to the needs of my country's green, low-carbon, technology-enabled, and environmentally sustainable development era, is an effective way to alleviate the current overcapacity of steel production. Summary of the Invention

[0004] The present invention aims to provide a novel prefabricated beam-column joint that connects steel columns and steel beams, while greatly reducing the amount of on-site welding work, ensuring that the flange surfaces of the I-beams are flush, and guaranteeing the strength and rigidity of the joint.

[0005] After the beam and column assembly is completed, this invention ensures that the upper and lower surfaces of the entire beam remain flush without any protrusions, facilitating subsequent floor slab installation and other engineering work. Secondly, it ensures that the on-site installation is a fully bolted connection, which has strong structural adaptability, is convenient to construct, does not weaken the cross section, has higher connection reliability than welding, and has high structural rigidity. Finally, the nested structure of the node itself ensures that the node has sufficient strength and rigidity.

[0006] To achieve the above objectives, this invention provides a nested prefabricated beam-column connection node with a pin-and-cover plate, comprising a column assembly, a beam assembly, and connectors. The column assembly includes an upper steel column, a lower steel column, and a box-shaped bracket with built-in bolted conduits; the beam assembly includes a horizontal I-beam and a box-shaped fitting with built-in bolted conduits; and the connectors include a pin-and-cover plate and high-strength bolts. On-site, the box-shaped fitting with built-in bolted conduits is inserted horizontally into the box-shaped bracket with built-in bolted conduits. The pin-and-cover plate is then placed parallel to the vertical surface of the beam-column connection. During installation, attention is paid to aligning the bolt holes. Finally, the node is tightened with high-strength bolts to complete the assembly.

[0007] The box-shaped fitting with built-in bolted pipe in the above-mentioned beam assembly is a rectangular empty box, which is formed by four steel plates to form a square frame structure. It is composed of cylindrical sleeves inside. There are eight bolt holes in four rows on the front and rear vertical panels. The corresponding positions of the bolt holes inside the fitting are cylindrical sleeves to avoid damage to the fitting due to excessive preload. The sleeve wall thickness is appropriately increased.

[0008] The box-shaped bracket with built-in bolted pipes in the aforementioned column assembly includes a top plate, a bottom plate, a rear vertical panel, a middle partition, a front vertical panel, a box-shaped bracket ear plate, a box-shaped bracket mortise, built-in bolted pipes, and a cuboid frame connector. The cuboid frame connector connects to the upper and lower steel columns respectively, with holes on the connecting surfaces. The top plate, bottom plate, rear vertical panel, middle partition, and front vertical panel form a closed hollow rectangular structure, with built-in bolted pipes inside. Four rows of eight bolt holes are provided on the front and rear vertical panels, corresponding to the built-in bolted pipes for bolts to pass through. The top plate, bottom plate, rear vertical panel, and middle partition form an open structure, which connects to the box-shaped fitting with built-in bolted pipes. Bolt holes are provided at the intersection of the rear vertical panel and the box-shaped fitting, corresponding to the built-in bolted pipes of the box-shaped fitting. The built-in bolted pipes are cylindrical sleeves, which prevent damage to the fittings due to preload. The top and bottom plates of the open-type box-shaped bracket are slightly sloped, sloping inwards from the opening to facilitate installation with the beam assembly on site. The rear vertical panel has four rows of sixteen bolt holes, and a box-shaped bracket ear plate is welded to the left edge of the rear vertical plate. The ear plate provides some fixation to the end plate of the I-beam and assists in load-bearing. The top and bottom plates are stepped, with two layers. The second step of both the top and bottom plates has three box-shaped bracket tenons in its vertical section. Furthermore, the middle partition of the box-shaped bracket prevents damage to the fittings due to preload. The partition divides the bracket into two spaces: the left open structure connects to the box-shaped fitting with built-in bolt pipes, while the right closed hollow rectangular structure has built-in bolt pipes. The fitting height is the same as the I-beam cross-section height, and the width is slightly less than the I-beam flange width.

[0009] The aforementioned pin cover plate includes a top plate, a bottom plate, an ear plate, and tenons. The width of the top and bottom plates is the same as the width of the first step of the top and bottom plates of the box-shaped bracket fitting with built-in bolt pipes. The ear plate is welded to the left side of the cover plate and its height is less than the height of the cover plate. Both the top and bottom plates are provided with 3 tenons, and the thickness of the tenons is slightly less than the thickness of the top and bottom plates. The height and width of the vertical panel of the cover plate are equal to the height and width of the box-shaped bracket fitting. Four rows of sixteen bolt holes are provided on the vertical surface of the cover plate, and the positions of the bolt holes are aligned with the bolt holes of the column area fittings.

[0010] The top and bottom plates of the aforementioned pin cover plate are flush with the top and bottom plates of the column area accessories. The tenon of the cover plate is inserted into the mortise of the box-shaped bracket with built-in bolt pipe, making the connected area a whole. At the same time, it avoids deformation of the open part of the box-shaped bracket with built-in bolt pipe, greatly improving the integrity and rigidity of the joint.

[0011] This invention provides an assembly method for the nested prefabricated beam-column connection node of the above-mentioned pin-type cover plate, comprising the following steps:

[0012] (1) The box-shaped fittings of the built-in bolted pipe and the box-shaped bracket of the built-in bolted pipe are first prefabricated in the factory. The upper steel column and the lower steel column are welded to the box-shaped bracket of the built-in bolted pipe through the upper and lower partitions. The I-beam is welded to the box-shaped fittings of the built-in bolted pipe.

[0013] (2) At the construction site, first complete the installation of the column components, and open the box-shaped bracket with the built-in bolt pipe facing the front;

[0014] (3) Hoist the beam assembly to the same horizontal position as the column assembly, align the box fitting of the built-in bolt pipe with the open part of the box bracket of the built-in bolt pipe, and then move the beam assembly horizontally to push the box fitting of the built-in bolt pipe into the open part of the box bracket of the built-in bolt pipe. At this time, the bracket ear plate is stuck in the end plate of the I-beam, and the corresponding bolt holes are aligned.

[0015] (4) Install the pin cover plate onto the vertical plane of the beam and column fitting connection. The pin cover plate ear plate clamps the end plate of the I-beam. The tenons on the top plate and bottom plate are inserted into the tenons of the box-shaped bracket with built-in bolt pipe. Finally, tighten the high-strength bolts at each position and apply pre-tightening force to complete the node installation. High-strength shims are used during installation.

[0016] The beneficial effects of this invention are:

[0017] (1) The present invention is a prefabricated structure, all components are easy to process and install, and the installation method is on-site bolt fastening, which is green and environmentally friendly, easy to operate, and shortens the on-site construction time;

[0018] (2) The mortise and tenon connection between the pin cover plate and the beam and column fittings enhances the integrity and rigidity of the connection area, increases the load-bearing area of ​​the connector, and thus improves the strength of the node; and experiments have shown that this structure can reduce the size of the opening at the connection and greatly improve the rigidity of the node.

[0019] (3) In addition to the strength provided by the connectors, the nested structure of the nodes themselves can also provide some strength, improve the strength performance of the structure in the node area, and meet the requirements of strong nodes and weak components.

[0020] (4) The novel node provided by the present invention is flush with the flange surface of the I-beam, which facilitates the subsequent laying of floor slabs, etc., and increases its practicality;

[0021] (5) The present invention provides the corresponding installation technology, which is easy to install, can greatly save construction costs, and has good economic benefits. It is a new type of beam-column joint with strong applicability, quick installation and excellent performance. Attached Figure Description

[0022] Figure 1 This is a three-dimensional front view schematic diagram of the nested assembled beam-column connection node with pin cover plate type of the present invention.

[0023] Figure 2 This is a three-dimensional rear view schematic diagram of the nested assembled beam-column connection node with pin cover plate type of the present invention.

[0024] Figure 3 This is an exploded view of the overall structure of the nested prefabricated beam-column connection node with pin cover plate of the present invention.

[0025] Figure 4 This is a three-dimensional schematic diagram of the beam assembly of the nested assembled beam-column connection node with pin cover plate of the present invention.

[0026] Figure 5 This is a three-dimensional exploded view of the column assembly of the nested assembled beam-column connection node with pin cover plate of the present invention;

[0027] Figure 6 This is a three-dimensional schematic diagram of the box-shaped bracket with built-in bolt pipe in the nested assembled beam-column connection node of the pin cover plate type of the present invention.

[0028] Figure 7 This is a three-dimensional schematic diagram of the box-shaped bracket of the built-in bolt pipe of the nested assembled beam-column connection node of the pin cover plate type of the present invention after removing the middle partition plate.

[0029] Figure 8 This is a three-dimensional schematic diagram of the pin cover plate of the nested assembled beam-column connection node of the present invention.

[0030] In the diagram, 1 is the beam assembly, 2 is the column assembly, 3 is the pin cover plate, 4 is the high-strength bolt, 5 is the box fitting with built-in bolted pipe, 6 is the I-beam, 7 is the upper steel column, 8 is the lower steel column, 9 is the box bracket with built-in bolted pipe, 10 is the ear plate of the box bracket, 11 is the mortise of the box bracket, 12 is the built-in bolted pipe, 13 is the cover plate ear plate, 14 is the cover plate tenon, 15 is the rear vertical panel, and 16 is the middle partition plate. Detailed Implementation

[0031] The present invention will be further illustrated by the following embodiments, but is not limited to the following embodiments. Example

[0032] like Figures 1-6 As shown, this invention provides a novel nested prefabricated connection node with a pin cover plate, including a beam assembly 1, a column assembly 2, and connectors; wherein the beam assembly includes a box-shaped fitting 5 with built-in bolt pipes and an I-beam 6, both of which are welded in the factory; the column assembly includes an upper steel column 7, a lower steel column 8, and a box-shaped bracket 9 with built-in bolt pipes, all of which are welded in the factory; the connectors include a pin cover plate 3 and high-strength bolts 4; the box-shaped fitting 5 with built-in bolt pipes is inserted horizontally into the box-shaped bracket 9 with built-in bolt pipes, and the pin cover plate 3 is placed on the vertical surface of the connection. During installation, attention should be paid to aligning the bolt holes, and finally, the high-strength bolts 4 are tightened with a torque wrench according to the specified preload.

[0033] The aforementioned box-shaped fitting 5 with built-in bolted pipe is formed by four steel plates forming a square frame structure. The cylindrical sleeve inside forms the built-in bolted pipe 12. There are eight bolt holes in four rows on the front and rear vertical panels. The cylindrical sleeve is positioned to correspond to the bolt holes inside the fitting, so as to avoid damage to the fitting due to pre-tightening force. The wall thickness of the cylindrical sleeve is appropriately increased, and the thickness is about 1 / 2 of the bolt hole radius.

[0034] The aforementioned box-shaped bracket 9 with built-in bolted pipes includes a top plate, a bottom plate, a rear vertical panel 15, a middle partition 16, a front vertical panel, a box-shaped bracket ear plate 10, a box-shaped bracket tenon 11, built-in bolted pipes 12, and a cuboid frame connector. The cuboid frame connector is connected to the upper and lower steel columns respectively, with holes on the connecting surfaces. The top plate, bottom plate, rear vertical panel, middle partition, and front vertical panel form a closed hollow rectangular structure, inside which is the built-in bolted pipe 12. Four rows of eight bolt holes are provided on the front and rear vertical panels, corresponding to the built-in bolted pipes 12, for bolts to pass through. The top plate, bottom plate, rear vertical panel, and middle partition form an open structure, which connects to the box-shaped fitting 5 with built-in bolted pipes. Bolt holes are provided at the intersection of the rear vertical panel and the box-shaped fitting, corresponding to the built-in bolted pipes of the box-shaped fitting. The built-in bolted pipes are cylindrical sleeves, which prevent damage to the fittings due to preload. The top and bottom plates of the open structure of the box-shaped bracket are slightly sloped, sloping inward from the opening to facilitate installation on the construction site and with the beam assembly. The rear vertical panel 15 has four rows of sixteen bolt holes, and a box-shaped bracket ear plate 10 is welded to the left edge of the rear vertical panel 15 of the box-shaped bracket 9. The bracket ear plate 10 provides some fixing to the end plate of the I-beam and assists in load-bearing. The top and bottom plates are stepped, with two layers of steps. The second step of both the top and bottom plates has three box-shaped bracket tenons 11 on its vertical section. Furthermore, the middle partition 16 of the box-shaped bracket prevents damage to the fittings due to preload. The middle partition 16 divides the bracket into two spaces: the left open structure connects to the box-shaped fitting 5 with built-in bolt pipes, and the right closed hollow rectangular structure has built-in bolt pipes 12. The height of the fitting is the same as the cross-sectional height of the I-beam, and its width is slightly less than the flange width of the I-beam.

[0035] The aforementioned pin cover plate 3 includes a top plate, a bottom plate, an ear plate, and tenons. The width of the top and bottom plates is the same as the width of the first step of the top and bottom plates of the box-shaped bracket. The ear plate 13 is welded to the left side of the cover plate and its height is less than the height of the cover plate. The top and bottom plates are each provided with 3 tenons, and the thickness of the tenons is slightly less than the thickness of the top and bottom plates. The length and width of the vertical plate of the cover plate are equal to the length and width of the box-shaped bracket with built-in bolt pipes. Four rows of sixteen bolt holes are provided on the vertical surface of the cover plate, and the positions of the bolt holes are aligned with the bolt holes of the box-shaped bracket with built-in bolt pipes.

[0036] The top and bottom plates of the aforementioned pin cover plate 3 are flush with the top and bottom plates of the box-shaped bracket with built-in bolt pipe. The tenon of the cover plate is inserted into the mortise of the box-shaped bracket with built-in bolt pipe, making the connected area a whole. At the same time, it avoids deformation of the open part of the box-shaped bracket with built-in bolt pipe, greatly improving the integrity and rigidity of the node.

[0037] This invention provides an assembly method for the above-mentioned nested prefabricated beam-column connection node with a pin cover plate, comprising the following steps:

[0038] (1) The box-shaped fittings of the built-in bolted pipe and the box-shaped bracket of the built-in bolted pipe are first prefabricated in the factory. The upper steel column and the lower steel column are welded to the box-shaped bracket of the built-in bolted pipe through the cuboid frame connector. The I-beam is welded to the box-shaped fittings of the built-in bolted pipe.

[0039] (2) At the construction site, first complete the installation of the column components, and make the opening of the box-shaped bracket with built-in bolt pipes face the front;

[0040] (3) Hoist the beam assembly to the same horizontal position as the column assembly, align the box fitting with the box bracket with the left open part of the box bracket with the built-in bolt pipe, and then move the beam assembly horizontally to push the box fitting with the built-in bolt pipe into the left open part of the box bracket with the built-in bolt pipe. At this time, the ear plate at the edge of the column assembly and the beam assembly is stuck in the end plate of the I-beam, and the corresponding bolt holes are aligned.

[0041] (4) Install the pin cover plate onto the vertical plane of the beam and column fitting connection. The pin cover plate ear plate clamps the end plate of the I-beam. The tenon on the top and bottom plates is inserted into the tenon of the box-shaped bracket with built-in bolt pipe. Finally, tighten the high-strength bolts at each position and apply pre-tightening force to complete the node installation. High-strength shims are used during installation.

[0042] The present invention and its embodiments have been described above. This description is not limiting, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and practical examples without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A nested prefabricated beam-column connection node with a pin-and-cover plate, characterized in that: It includes column components, beam components, and connectors; the column components include upper steel columns, lower steel columns, and box-shaped brackets with built-in bolted pipes; the beam components include horizontal I-beams and box-shaped fittings with built-in bolted pipes, and the connectors include pin covers and high-strength bolts; the box-shaped fittings with built-in bolted pipes are inserted horizontally into the box-shaped brackets with built-in bolted pipes, and the pin covers are placed parallel to the vertical surface where the beam and column components connect, and the joint is fastened with high-strength bolts.

2. The nested prefabricated beam-column connection node of the pin-and-cover type according to claim 1, characterized in that: The box-shaped fitting with built-in bolted pipe in the beam assembly consists of a square frame structure formed by four steel plates, with a cylindrical sleeve inside. There are eight bolt holes in four rows on the front and rear vertical panels. The bolt holes inside the fitting are located in the cylindrical sleeve to avoid damage to the fitting due to excessive preload.

3. The nested prefabricated beam-column connection node of the pin-and-cover type according to claim 1, characterized in that: The box-shaped bracket with built-in bolt pipes in the column assembly includes a top plate, a bottom plate, a rear vertical panel, a middle partition, a front vertical panel, a box-shaped bracket ear plate, a box-shaped bracket mortise, built-in bolt pipes, and a cuboid frame connector. The cuboid frame connector is connected to the upper and lower steel columns respectively, and has holes on the connecting surface. The top plate, bottom plate, rear vertical panel, middle partition, and front vertical panel form a closed hollow rectangular structure with built-in bolt pipes inside. There are four rows of eight bolt holes on the front and rear vertical panels, which correspond to the built-in bolt pipes for bolts to pass through. The top plate, bottom plate, rear vertical panel, and middle partition form an open structure, which is connected to the box-shaped fitting with built-in bolt pipes. Bolt holes are provided at the intersection of the rear vertical panel and the box-shaped fitting, corresponding to the built-in bolt pipes of the box-shaped fitting.

4. The nested prefabricated beam-column connection node of the pin-and-cover type according to claim 3, characterized in that: The top and bottom plates of the box-shaped bracket open structure are slightly sloped, sloping inward from the opening to facilitate installation with the beam components on the construction site. The rear vertical panel has four rows of sixteen bolt holes, and a box-shaped bracket ear plate is welded to the left edge of the rear vertical plate of the box-shaped bracket. The bracket ear plate plays a certain role in fixing the end plate of the I-beam and assisting in the stress. The top and bottom plates are stepped, with two layers of steps. The vertical section of the second step of both the top and bottom plates has three box-shaped bracket tenons.

5. The nested prefabricated beam-column connection node of the pin-and-cover type according to claim 1, characterized in that: The pin cover is a high-strength steel casting, including a top plate, a bottom plate, ear plates, and tenons. The width of the top and bottom plates is the same as the width of the first step of the top and bottom plates of the box-shaped bracket with built-in bolt pipes. The ear plates are welded to the left side of the cover plate and are less than the height of the cover plate. Both the top and bottom plates are provided with 3 tenons, and the thickness of the tenons is slightly less than the thickness of the top and bottom plates. The height and width of the vertical panel of the cover plate are equal to the height and width of the box-shaped bracket. There are 16 bolt holes in four rows on the vertical surface of the cover plate, and the positions of the bolt holes are aligned with the bolt holes of the box-shaped bracket with built-in bolt pipes.

6. The nested prefabricated beam-column connection node of the pin-and-cover type according to claim 5, characterized in that: The top and bottom plates of the pin cover plate are flush with the top and bottom plates of the box-shaped bracket of the built-in bolt pipe. The tenon of the cover plate is inserted into the mortise of the box-shaped bracket of the built-in bolt pipe, so that the connected area becomes a whole.

7. An assembly method for a nested prefabricated beam-column connection node with a pin cover plate as described in any one of claims 1 to 6, characterized in that... Includes the following steps: (1) The box-shaped fittings of the built-in bolted pipe and the box-shaped bracket of the built-in bolted pipe are first prefabricated in the factory. The upper steel column and the lower steel column are welded to the box-shaped bracket of the built-in bolted pipe through the upper and lower partitions. The I-beam is welded to the box-shaped fittings of the built-in bolted pipe. (2) At the construction site, first complete the installation of the column components, and open the box-shaped bracket with the built-in bolt pipe facing the front; (3) Hoist the beam assembly to the same horizontal position as the column assembly, align the box fitting of the built-in bolt pipe with the open part of the box bracket of the built-in bolt pipe, and then move the beam assembly horizontally to push the box fitting of the built-in bolt pipe into the open part of the box bracket of the built-in bolt pipe. At this time, the bracket ear plate is stuck in the end plate of the I-beam, and the corresponding bolt holes are aligned. (4) Install the pin cover plate onto the vertical plane connecting the beam and column components. The pin cover plate ear plate clamps the end plate of the I-beam. The tenons on the top plate and bottom plate are inserted into the tenons of the box-shaped bracket with built-in bolt pipe. Finally, tighten the high-strength bolts at each position and apply pre-tightening force to complete the node installation. High-strength gaskets are used during installation.

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